Mailing-List:	contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe:	<mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive:	<http://sources.redhat.com/ml/cygwin/>
List-Post:	<mailto:cygwin AT sources DOT redhat DOT com>
List-Help:	<mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender:	cygwin-owner AT sources DOT redhat DOT com
Delivered-To:	mailing list cygwin AT sources DOT redhat DOT com
From:	"Topas" <yrwang AT cc DOT nctu DOT edu DOT tw>
To:	<cygwin AT cygwin DOT com>
Subject:	stdout in gdb
Date:	Tue, 22 May 2001 15:01:14 +0800
Message-ID:	<NFBBJHGBKLKEAOHMECHMAEDDCAAA.yrwang@cc.nctu.edu.tw>
MIME-Version:	1.0
X-Priority:	3 (Normal)
X-MSMail-Priority:	Normal
X-Mailer:	Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0)
Importance:	Normal
X-MimeOLE:	Produced By Microsoft MimeOLE V5.50.4522.1200
X-MIME-Autoconverted:	from base64 to 8bit by delorie.com id DAA15115

Whenever I run a program under gdb, I find that the stdout is 
full-buffered.

So, I write a simple program to check the problem, 

int main()
{

printf("%s\n", ttyname(1));
printf("%d\n", isatty(1));
printf("%d\n", stdout->_flags & 0x0001);

return 0;
}

the output of the program is
/dev/tty0
1
1

but when I run the program under gdb, the output becomes
(null)
0
0

Is there any options/setting I miss in gdb? 

- Raw text -